carriage vs Pullman

carriage and Pullman both are nouns.

Word	Noun	Adjective	Verb	Adverb
carriage	Yes	No	No	No
Pullman	Yes	No	No	No

As nouns, Pullman is a hyponym of carriage; that is, Pullman is a word with a more specific, narrower meaning than carriage:

carriage (noun)	Pullman (noun)
a vehicle with wheels drawn by one or more horses	luxurious passenger car; for day or night travel
a railcar where passengers ride
a machine part that carries something else
a small vehicle with four wheels in which a baby or child is pushed around
characteristic way of bearing one's body